Wing bone
you have to watch the bore Diam of your gun if the bullet is to loose it may work its way up off your powder charge and then Accur. will fall off and it could also be DANGEROUS because of preshure build up behind the bullet before it pushes the bullet out. that is why you need to slug your barrle to make sure of the bore size befor ordering anything like I said My bore is .503.5 so I shoot a .504 to were the rifleings will cut the bullet to make sure the bullet stays seated on the powder charge, if your bore sluges out at .503 then you could shoot a .503.5 Dan will size them to any size you need. most of use use pure lead.
as far as a follow up shot or the cold I have not had any probblems reloading as the oversied wad pushes 95% of foulling back as it goes down wich inturn makes a smoother run for the bullet.
Sabot loader may have a little smaller bore than mine that is why he uses the .503 size , you need to slug you barrle